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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant.taskdefs;
import org.apache.tools.ant.AntClassLoader;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.types.Reference;
import org.apache.tools.ant.util.ClasspathUtils;
/**
* Base class for Definitions handling uri and class loading.
* (This was part of Definer)
*
* @since Ant 1.6
*/
public abstract class DefBase extends AntlibDefinition {
private ClassLoader createdLoader;
private ClasspathUtils.Delegate cpDelegate;
/**
* Check if classpath attributes have been set.
* (to be called before getCpDelegate() is used.
* @return true if cpDelegate has been created.
*/
protected boolean hasCpDelegate() {
return cpDelegate != null;
}
/**
* @param reverseLoader if true a delegated loader will take precedence over
* the parent
* @deprecated since 1.6.x.
* stop using this attribute
* @ant.attribute ignore="true"
*/
public void setReverseLoader(boolean reverseLoader) {
getDelegate().setReverseLoader(reverseLoader);
log("The reverseloader attribute is DEPRECATED. It will be removed",
Project.MSG_WARN);
}
/**
* @return the classpath for this definition
*/
public Path getClasspath() {
return getDelegate().getClasspath();
}
/**
* @return the reverse loader attribute of the classpath delegate.
*/
public boolean isReverseLoader() {
return getDelegate().isReverseLoader();
}
/**
* Returns the loader id of the class path Delegate.
* @return the loader id
*/
public String getLoaderId() {
return getDelegate().getClassLoadId();
}
/**
* Returns the class path id of the class path delegate.
* @return the class path id
*/
public String getClasspathId() {
return getDelegate().getClassLoadId();
}
/**
* Set the classpath to be used when searching for component being defined.
*
* @param classpath an Ant Path object containing the classpath.
*/
public void setClasspath(Path classpath) {
getDelegate().setClasspath(classpath);
}
/**
* Create the classpath to be used when searching for component being
* defined.
* @return the classpath of the this definition
*/
public Path createClasspath() {
return getDelegate().createClasspath();
}
/**
* Set a reference to a classpath to use when loading the files.
* To actually share the same loader, set loaderref as well
* @param r the reference to the classpath
*/
public void setClasspathRef(Reference r) {
getDelegate().setClasspathref(r);
}
/**
* Use the reference to locate the loader. If the loader is not
* found, the specified classpath will be used and registered
* with the specified name.
*
* This allows multiple taskdef/typedef to use the same class loader,
* so they can be used together, eliminating the need to
* put them in the CLASSPATH.
*
* @param r the reference to locate the loader.
* @since Ant 1.5
*/
public void setLoaderRef(Reference r) {
getDelegate().setLoaderRef(r);
}
/**
* create a classloader for this definition
* @return the classloader from the cpDelegate
*/
protected ClassLoader createLoader() {
if (getAntlibClassLoader() != null && cpDelegate == null) {
return getAntlibClassLoader();
}
if (createdLoader == null) {
createdLoader = getDelegate().getClassLoader();
// need to load Task via system classloader or the new
// task we want to define will never be a Task but always
// be wrapped into a TaskAdapter.
((AntClassLoader) createdLoader)
.addSystemPackageRoot("org.apache.tools.ant");
}
return createdLoader;
}
/**
* @see org.apache.tools.ant.Task#init()
* @throws BuildException on error.
* @since Ant 1.6
*/
public void init() throws BuildException {
super.init();
}
private ClasspathUtils.Delegate getDelegate() {
if (cpDelegate == null) {
cpDelegate = ClasspathUtils.getDelegate(this);
}
return cpDelegate;
}
}
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